package com.wwc.sc.service.impl;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import com.wwc.sc.service.PaymentService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import javax.annotation.Resource;
import java.util.concurrent.TimeUnit;

/**
 * @author WWC
 */
@Service
public class PaymentServiceImpl implements PaymentService {

    /**
     * 正常访问，一切OK
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id) {
        return "线程池:"+Thread.currentThread().getName()+"paymentInfo_OK,id: "+id+"\t"+"O(∩_∩)O";
    }

    /**
     * 超时访问，演示降级
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
            @HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value="5000")
    })
    public String paymentInfo_TimeOut(Integer id) {
        //int age = 10/0;
        int time = 3;
        try {
            TimeUnit.SECONDS.sleep(time);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池:"+Thread.currentThread().getName()+"paymentInfo_TimeOut,id: "+id+"\t"+"O(∩_∩)O哈哈~，耗费"+time+"秒";
    }

    public String paymentInfo_TimeOutHandler(Integer id) {
        return "线程池:"+Thread.currentThread().getName()+"服务运行异常，请稍后再试！,id: "+id+"\t"+"o(╥﹏╥)o";
    }

    //==========================================服务熔断===========================================
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),//是否开启服务熔断
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),//服务访问次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"),//时间范围
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"),//服务在达到访问次数之后的错误率
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id)
    {
        if(id < 0)
        {
            throw new RuntimeException("******id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName()+"\t"+"调用成功，流水号: " + serialNumber;
    }
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id)
    {
        return "id 不能负数，请稍后再试，/(ㄒoㄒ)/~~   id: " +id;
    }



}
